Percentage calculator for percent of, change and discount
Fill in any of the four boxes below to work out a percent of an amount, what percent one number is of another, a percent change, or a price after a discount or a rise.
Find a percent of an amount.
30
15% of 200 is 30.
15 ÷ 100 × 200 = 30
Find what percent one number is of another.
15%
30 is 15% of 200.
30 ÷ 200 × 100 = 15%
Find the percent change from one number to another.
+25%
An increase of 25%, from 80 to 100.
(100 − 80) ÷ 80 × 100 = +25%
Add a percent to an amount, or take a percent off it.
What to do with the percent
169.15
199 less 15% is 169.15, which is 29.85 less.
199 − 199 × 15 ÷ 100 = 169.15
These common cases are worked out for you.
| Case | Answer |
|---|---|
| 15% off ₪199 | ₪169.15, a saving of ₪29.85 |
| 18% of ₪1,000 | ₪180 |
| 20% off ₪350 | ₪280, a saving of ₪70 |
| Add 10% to ₪300 | ₪330 |
| ₪50 as a percent of ₪400 | 12.5% |
| From ₪80 to ₪100 | 25% more |
| From ₪100 to ₪80 | 20% less |
A fall of 20% is undone by a rise of 25%, not 20%, because each change is measured from where it starts.
Each answer comes from one short formula.
- A percent of an amount: divide the percent by 100 and multiply by the amount.15 ÷ 100 × 200 = 30
- What percent one number is of another: divide the part by the whole and multiply by 100.30 ÷ 200 × 100 = 15%
- A percent change: take the old number from the new one, divide by the old number and multiply by 100.(100 − 80) ÷ 80 × 100 = 25%
- Adding or taking off a percent: work out the percent of the amount, then add it or take it away.199 − 199 × 15 ÷ 100 = 169.15
Answers are rounded to two decimals, half up, as you would on paper.
These three pages answer what people ask next about money in Israel.
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What an amount is worth after the change in the Consumer Price Index.
People ask these questions about percentages.
How do I work out a percentage of a number?+
Divide the percent by 100 and multiply by the number. For example, 15% of 200 is 30: 15 divided by 100 is 0.15, and 0.15 times 200 is 30.
How do I work out a discount?+
Work out the percent of the price and take it off. For 15% off ₪199, the saving is ₪29.85 and the price is ₪169.15. To find the discount from an old price to a new one, use the percent change: from ₪250 to ₪200 is 20% off.
How do I work out a percent change?+
Take the old number from the new one, divide by the old number and multiply by 100. From 80 to 100 is an increase of 25%. From 100 back to 80 is a decrease of 20%, not 25%, because the change is always measured from the number you start with.
What is the difference between percent and percentage points?+
A percent is a share of a number, and percentage points are the gap between two percentages. If a rate goes from 4% to 6%, it has gone up 2 percentage points, which is an increase of 50%.
How do I add a percent to a number?+
Work out the percent of the number and add it. To add 10% to ₪300, 10% of ₪300 is ₪30, so the total is ₪330. A shortcut is to multiply by 1 plus the percent divided by 100, which here is ₪300 times 1.1.
Working with prices and pay? The VAT calculator adds VAT to a price or takes it out, and the net salary calculator shows what a month's pay leaves after tax.